公开(公告)号：US3806619A

公开(公告)日：1974-04-23

申请号：US24980972

申请日：1972-05-03

Applicant: STUDIENGESELLSCHAFT KOHLE MBH

Inventor： ZOSEL K

IPC: A23F5/20 ,  B01D11/02 ,  C07D473/12 ,  A23F1/10

CPC classification number: A23F5/206 ,  B01D11/0203 ,  C07D473/12 ,  Y02P20/544

Abstract: A process for obtaining caffein from green coffee by withdrawing the caffein by means of recirculating moist carbon dioxide in supercritical state, which comprises removing the caffein from the caffein-loaded carbon dioxide by repeated treatment with water and recovering the caffein and the water from the resultant dilute aqueous caffein solution by recycling a stream of air or nitrogen under a superatmospheric pressure at about 1 to 5 atmospheres through the heated caffein solution and a heat exchanger, separating the caffein and the condensed water and recycling after admixture of cold caffein solution the gas through the heat exchanger in countercurrent flow relation and meeting the heat requirement by supplying heat to the hot caffein solution.

Abstract translation: 一种通过在超临界状态下再循环湿二氧化碳来抽出咖啡因，从咖啡中获得咖啡因的方法，该方法包括通过用水反复处理从含有咖啡因的二氧化碳中除去咖啡因，并从所得物中回收咖啡因和水 通过加热的咖啡因溶液和热交换器在约1至5个大气压下在超大气压下再循环空气或氮气来稀释咖啡因水溶液，分离咖啡因和冷凝水，并在冷的咖啡因溶液加入气体后通过再循环 热交换器逆流流动关系，并通过向热咖啡因溶液供热来满足热需求。